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The effect of time of sowing on soybean seed quality

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The effects of sowing date on seed quality of cool tolerant soybean cultivars were examined over two seasons at Lincoln University, Canterbury, New Zealand (Lat. 43° 38'S, Long. 172°, 30'E). Seeds of four cultivars (Northern Conquest, March, Maypole and Alta) were sown at three dates (15 November, 7 and 29 December, 1999) in the first season, while cultivars Northern Conquest and March were sown at four dates (2 and 17 October, 1 and 16 November, 2000) in the following season. In 1999/2000, germination did not differ among sowing dates or cultivars, but seed vigour, as assessed by the accelerated ageing and conductivity tests, was reduced as sowing was delayed and also differed among cultivars. There was a sowing date × cultivar interaction for results from both vigour tests. In the second season the highest seed quality (germination and vigour) came from seed from the 17 October sowing and seed quality was lower in seed from the 16 November sowing. Again there were interactions between sowing dates and cultivars for seed quality parameters. To minimise seed quality losses, sowing between mid-October and early November is recommended for this site. Losses in seed quality were not associated with temperature during seed desiccation.
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Document Type: Research Article

Publication date: October 1, 2005

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  • Seed Science and Technology (SST) is one of the leading international journals featuring original papers and review articles on seed quality and physiology as related to seed production, harvest, processing, sampling, storage, distribution and testing. This widely recognised journal is designed to meet the needs of researchers, advisers and all those involved in the improvement and technical control of seed quality.
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